Burnishing-machine.



F. M. FURBER.

BURNISHING MACHINE.

APPLICATION mm FEB. l9. 9: 5.

Patented Nov. 12, 1918.

5 SHEETSSHEET l Q R T VV/T/VES F. M. FURBER.

BURNISHING MACHINE.

APPLICATION FILED FEB. 19.1915.

1,284,303. Patented Nov. 12, 1918.

5 SHEETS-SHEET 2- Y l/v/m ssfi I //\/v 7?; KMQ M f F. M. FURBER.

BURNISHING MACHINE.

APPLICATION HLED FEB. 19. m5.

Patented Nov. 12, 1918. l

5 SHEETS-SHEET 3 I/V/T/VESSES aiwu Q W.

m: mun: rstin: m. rumumq F. M. FURBER/ BURNISHING MACHINE.

APPLICATION FILED FEB. 19. 1915.

1,284,303. Patented Nov. 12, 1918.

5 SHEETS-SHEET 4.

W/TA/ZSSEQ F. M. FURBER.

BURNISHING MACHINE.

APPLICATlON FILED FEB. I9, 1915.

Patvnfed Nov. 12, 1918.

5 SHEETS-SHEET 5 l/V/T/VESSES WVE 7 R zwfi m f m] Eiwn/ v STATES PATENT oEEioE.

FREDERICK i/LEUEBER, 70F REVERE, iviirssAonusErrs, As'sronon, ZBY MESNE ASSIGN- MENTS, TO UNITED SHOE MACHINERY CORPORATION, OF PATERSON, NEVT JERSEY,

A CORPORATION OF'NEW JERSEY.

BURNISHING-MACHINE.

Specification of Letters Patent. v Patented NOV. 12,1918.

Application filed February 19, 1915. Serial No. 9,343.

To all whom it may concern:

Be it known that I, F REDERIOK M. F URBER,

a citizen of the United States, residin at Revere,.in the county of Suffolk and of Massachusetts, have invented certain Improvements in Burnishing-Machines, of which the following description, in connection with the accompanying drawings, is a specification, like reference characters on the drawings indicating like parts in the several figures.

This invention relates to burnishing machines, and particularly to burnishing machines employed in the manufacture of boots and shoes for burnishing or setting the edge of the sole. This invention is especially concerned with that type of burnishing or edge setting machines in which the tool or iron is given a rapid to-and-fro motion.

It is customary, in burnishing machines, to heat the iron in order to produce satisfactory work. Gas and steam have heretofore been used to heat the iron but have proved unsatisfactory because of the unavoidable clumsiness of the construction, the uncleanliness and waste of heat and consequent expense and discomfort which at tend their use, and for other reasons. It has already been proposed to use electricity for the purpose of heating the irons of edge setting machines, but considerable difliculty in the development of such machinery has been experienced on the score of economy. Electric energy is expensive, and the devices which have been proposed for using it in the type of machines described have been so wasteful that, for this reason amongothers, they have never gone into commercial use. It is an important object of my invention to provide practical and economical means for the application of'el'ectric heat to a machine of this type which shall obviate disadvantages heretofore existing in such electrically heated machines.

It is a further object of my invention to improve and simplify the construction of tate so that-minimum surface for wasteful radiation is provided. This secures the desired economy in the use of the electric energy.

Another feature of my invention is a novel construction of finger rest or hook,

which is normally movable from operative position but which is locked in operative position by the operator.

A further feature of my invention. is the provision of novel and improved means for interchanging the operative positions of the tools carried by a multiple tool holder. A

.further feature is the provision of novel trated in combination, the resilient member acting also as a locking bolt for the shifting tool holder.

The-invention also comprises otherv features including certain details of construction and combinations and arrangementsof parts which will be later described and claimed. 7

In the accompanying drawings -which show a preferred embodiment of the invention in a vibrating tool edge setting machine, V

Figure 1 is a side elevation of the machine,

Fig.2 is a plan view of the oscillating tool carrying mechanism, with certain overhanging parts cut away,

Fig. 3 is a front elevation of the finger hook, l

Fig. 4 is a central longitudinal section, on a larger scale,

Fig. 5 is an enlarged front elevation, with the unit carrying pocket in section,

Fig. 6 is an enlarged section ofthe unit,

Fig. 7 is an enlarged detail of the finger hook, and

Figs. 8, 9 and 10 are details showing the fastening of the ends of the resistance'wire.

The V-shaped frame 10 has at its ends bearings 11, in which the oscillating shaft 12 is supported. This shaft carries the tight pulley 13' and loose pulley 14, on which the belt 15 is shifted bythe shifter 16. The tight pulley 13 carries the casing 17 in which runs a mechanism which transforms the rotary motion of the pulley 13 into an oscillatory motion' of the shaft 12. This it from turning.

mechanism forms the subject-matter of my application for Patent No. 870,313, filed Nov. 4, 1914, and need not be further described here.

The shaft 12 carries a burnishing mechanism at each end, and as these are identical, only one will be shown and described. A hole 18 is fgrmed in the end of the shaft 12, and a small socket 19 is made at the bottom of it. A bolt 20, having a small socket 21 at its'rear end slides in the hole 18. A strong spring 22 has its ends mounted in the sockets 19 and 21, and thereby resiliently supports the bolt 20 and prevents Threaded to the bolt 20 is a bolt 23, having a shoulder 24 and a reduced capstan head 25 at its front end. The capstan head 25 carries a lug 26.

The oscillating head or rocker frame 27 having at its lower front a stop 27 is slipped over the end of the shaft 12 and fastened by the set screw 28. It has at its front a hole 29 fitting the capstan head 25. The shoulder 24 rests against the inside edge of the hole 29 and the capstan head 25 projects through it, the head 27 thus confining the bolt 23 in the hole 18 while permitting it to rotate and to recede. The rotation of the bolt 23 adjusts the efiective length of the combined bolts 20, 23 by means of the thread and thereby adjusts the ten sion of the spring 22.

Pivoted to the rocker frame 27 at 30 is a carrier 31, having at its lower rear a stop 31 which has two extensions 32 straddling the lower end of the rocker frame and extending behind the pivot. A spring 33 is mounted on the extensions 32 and bears against the back of the rocker frame 27 in order to support resiliently the carrier 31 against downward rotation about its pivot '30. The stops 27 and 31 contact when the carrier 31 is tilted counter-clockwise (in Fig. 4) and limit its tilting movement. The

'carrier 31 is split at 34, forming a cylindrical bearing 34 the cap 35 of which is attached by the screws 36.

Mounted in the bearing 34 is a spindle 37 of the tool holder. The spindle carries at its top the cap 38, and at'its bottom the foot 39. The former has two upwardly projecting lugs 40, forming a slot 41, and two oppositely disposed notches 42, adapted to engage the lug 26. It will be clear that the spring 33 holds the carrier 31 upright and keeps one notch 42 engaged with the lug 26 when the spindle 37 is properly placed, thus locking the tool holder against rotation. The foot 39 carries two little spindles 43, upon which the shank and forepart irons 44, 45 are held by the springs 46. It will be evident that when suilicient pressure is exerted by the operator on the shoe, the carrier 31 will be rotated clockwise in Fig. 1, forcing the bolts 20, 23,

backward and compressing the spring 22 The irons 44, 45 are thus resiliently supported and are enabled to follow the curved contour of the sole edge better than irons which are arranged to move only in arcs of circles.

Mounted on the carrier 31 are two uprights 47, carrying binding posts 48 insulated by the fiber washers 49. The cap 35 has a cylindrical pocket 50 parallel to and co-extensive with the spindle 37, in which an electric heating unit 51 is carried. The pocket 50 has two opposed slots 52 through its wall at its upper end, and the lead wires 53, covered with the insulating beads 54 pass through these slots and are attached to the upper end of the unit. The pocket 50 has a mica floor 50 and the two beads which rest in the slOts 52 are of mica instead of glass in order to resist the intense heat at these points. The terminals 55 are fastened to the binding posts 48. It will thus be seen that the unit 51 is disposed co-extensive with the spindle 37 and as close thereto as is practicable, and that both are mounted in the same mass of metal, so that the transfer of heat is easy and the radiating surface and consequent waste are reduced to a minimum. Current is supplied through the binding posts by the conductor 56, which leads to a rheostat 57, the resistance of which is utilized to heat its base 58, carrying pins 59, on which spare irons 44 may be kept hot when not in use. Current is supplied to the rheostat through the terminals 60.

It should be noted that the slots 52 are as close as is practicable to the axis of oscillation of the shaft 12. The lead wires 53 are therefore subject to minimum vibration where they enter the unit 51. Thus breakage of the lead wires at this point, which is a serious objection to apparatus of this type heretofore used, is obviated.

The electrical unit itself is shown in Figs. 6, 8, 9 and 10. A nickel steel rod 61 has mounted on its central portion an externally threaded lava core 62. Below the core is a nickel steel washer 63 and below this is a mica washer 64 of larger diameter than the main body of the unit, and adapted to fit closely in the pocket 50. A steel washer 65 is mounted below the mica washer 64 and the rod 61 is headed at this end. Above the lava core 62 is mounted a lava ring 66 of smaller diameter than the lava core and outside of this is mounted a nickel steel ring 67 of the same diameter as the lava core, and of the same width as the lava ring 66. Above these two rings is a mica washer 68 like the mica Washer 64. A head 69 is formed on the rod 61. A resistance wire 7 O is wound in the thread on the lava core 62, its ends are placed in slots 71 in the nickel steel members 63, 67, and the sides of the slots are then upset upon them. The lead wires 53 of expansion for heat, and the rod 61, with its two heads compresses the members it carriesand supports them longitudinally, while the resistance wire supports the lava core laterally. Thus a strong unit, resistant to shocks, and vibration, is secured.

A lever 72 is 'pivotally mounted at78 in the frame 10.. It is forked at its upper end and carries a pivoted pin 73 in the fork. This pin has a threaded hole 74 at its center and in this threaded hole is mounted a coarse pitched screw 75, with a screw-driver end 76. The rear face of the pin 73 is fiat and engages a stop 77 on the cap of the bearing 11. When in contact with this stop the pin 73 is so turned that the screw driver end 76 is just above'the slot 41. A spring 78 normally holds the pin 73 against the stop 7. When pressure is exerted against the head 79, at the lower end of the lever, the pin 7 5 is swung down and the screw driver end 76 engages the slot 41. Thus a combined thrust and torque is exerted on the head 38 of the tool holder. The torque is resisted by the lock 2612 and the thrust forces the carrier counter clockwise in Fig. 1, about the pivot 30, against the spring 33 until the head 38 swings free from the lug 26 and the stops 27 and 31 contact. The torque is no longer resistedand begins to rotate the tool holder, the screw meanwhile.turning, as the pin 73 is forced down over it by the lever 72. The lever 72 carries at its upper end a stop 80 which; engages (see dotted lines in Fig. 2) the side 81 of the head 38, when the tool holder has turned approximately 180 and brought the other iron forward. Release of pressure on the head 79 then permits the carrier 31 to be forced back by the spring 33 until'the other notch 42 engages the lug 26, thus locking the holder in operative position again. It will he noted that the slot 41 is substantially in the center of oscillation of the shaft 12. Thus the engagement of the screw driver end 7 6 with the slot is made positive and certain.

The lower arm of the lever 72 carries a finger hook or rest 82 mounted in a bearing. Therear end of the bearing has a stepped slot 83 and the finger hook carries a stepped collar 84. A spring 85 bears against the collar 84 and the lever 72 and thus forces the hook backward untilthe collar 86 bears against the front of the lever-72. The step 87 of the collar 84 will just fit in the bottom step'of the slot 83, but is normally held free of this bottom step by the spring 85. The collar 86 is adjustable by means of theset screw 86 shown in Figs. 1, 3, 5, and the collar .84: is likewise adjustable by means of the set screw 84'. (Figs. 1, 7 The operative position of the hook 82 may thus'be adjusted. The hook 82 may therefore nor mally swing slightly from side to side, the step 87 being confined only by the upper step of the slot 83, which is widerthan the step 87. hen, however, the'hook- 82 is pulled to the front, the spring 85 is compressed, and the step 87 settles into the bottom of the slot 83, where it fits snugly, and the hook is then locked against rotation. A gas burner 88 is provided on the finger hook to heat the iron in case electric power is not available.

In using the machine, the operator adjusts the electric current until the proper temperature of the irons is obtained, and then starts the machine, with, say, the forepart iron in operative position. He sets the forepart edge all around, using the finger hook 82 as he rounds the toe, pulling it out into locked position, as soon as he touches it. When the fore part is finished, the operator presses the sole of the shoe against the head 7 9 without shifting his position on the floor. The lever 72 and its attached parts then unlock the tool holder from the rocker frame, and rotate it 180 as above described, whereupon the operator releases his pressure on the head 79 and the tool holder settles back into locked relation with the rocker frame, with the shank iron in operative position. In setting the edge of the shank the hook 82 tips to one side or the other to per mit that part of the shank adjacent to the breast to be set without interference between the heel and finger hook. The resilient mounting of the irons permits them to move in paths which conform to the shape of the sole edge more closely than do the arcs of circles in which they oscillate when no pressure is being exerted against them.

The novel electric heating unit disclosed herein is claimed in my divisional application Serial No. 36,721, filed June 28, 1915, and is therefore not claimed herein.

Having described my invention, what I claim as new and desire to secure byLetters Patent of the United States is 1. A machine of the class described having, in combination, a rocker frame, a tool holder tiltably and rotatably mounted thereon, a plurality of burnishing tools mounted on said holder and mechanism for tilting and subsequently rotating said holder whereby the positions of the tools are interchanged.

2. A machine of the class described having, in combination, a rocker frame, a carrier pivotally attached thereto, a tool holder having a plurality of tools thereon pivotally mounted in said carrier, and a lock for said tool holder, operable by the pivotal motion of the carrier.

3. A machine of the class described having, in combination, a rocker frame, a tool. holder attached thereto, and constructed and arranged to yield pivotally under the member for said holder confined in said shaft by said head.

5. A machine of the class described having, in combination, a rocker frame, a burnishing mechanism mounted to rotate into locked and unlocked relation with said frame and having a plurality of operative positions, and means for unlocking said mechanism and for shifting it from one operative position to another, said means engaging said mechanism substantially in the axis of oscillation of said rocker frame.

6. A machine of the class described, having, in combination, a rocker frame, a burnishing mechanism having a plurality of operative positions and a member constructed and arranged to lock said mechanism in position on said rocker frame and resiliently cushion said mechanism.

7. A machine of the class described having, in combination, a rocker frame, a burnishing mechanism having a plurality of operative positions and an adjustably resilient device on the rocker frame constructed and arranged to latch and cushion said mechanism.

8. A machine of the class described having, in combination, a rocker frame, a tool holder tiltably and rotatably mounted thereon and carrying a plurality of tools, and a single mechanism constructed and arranged to lock said holder against rotation and to hold the same resiliently against tilting.

9. A machine of the class described having, in combination, a rocker frame, a carrier, a tool holder, means for locking the holder to the rocker frame and means for changing the angular relation of the holder and carrier.

10. A machine of the class described having, in combination, a rocker frame, a tool holder mounted on said rocker frame to pivot about tWo axes, and means for turn ing said tool holder about both of said axes.

11. A machine of the class described having, in combination, a rocker frame, a carrier pivotally mounted upon said frame, a tool holder movably mounted upon said carrier, and means on said rocker frame to lock said tool holder against motion relative to said carrier.

12. A machine of the class described having, in combination, a rocker frame, a tool holder mounted to rotate about two axes with respect to said frame, and means normally preventing rotation about one of said axes, so constructed and arranged to oppose resiliently rotation about the other of said axes.

13. A machine of the class described having, in combination, a rocker frame, a carrier, a tool holder movable relative to the carrier into different operative positions, and means for positively moving said holder from One operative position to another, said holder being rotatable into and out of locking engagement With said rocker frame.

14. A machine of the class described hav ing, in combination, a rocker frame, a carrier pivotally mounted thereon, a tool holder rocking With said frame, and movable relative to said frame into different operative positions, and a resilient locking member normally engaging said holder, so constructed and arranged as to disengage it by motion of the carrier in one direction about its pivotal mounting, and resiliently permit motion of the carrier in the other direction about its pivotal mounting.

15. A machine of the class described having, in combination, a rocker frame, a tool holder movable relative thereto into different operative positions, and rotatable into and out of interlocking engagement With said frame, and an actuating device located close to the position occupied by the shoe When in burnishing position and arranged to be operated by a bodily movement of the shoe out of burnishing position and into engagement with said device, and means intermediate said device and tool holder arranged to transmit the motion of said actuator to said holder to rotate it out of said interlocking engagement and to move the holder to another operative position.

16. A machine of the class described having, in combination, a rocker frame, a tool holder movable relative thereto into a plurality of operative positions, and an actuating device for moving said holder from i one operative position to another, comprislfeing a stop for arresting the motion of the tool holder when another operative position has been reached.

17 A machine of the class described having, in combination, a tool holder, having a plurality of operative positions, a lever for moving said holder from one operative position to another, and a stop carried by said lever to contact With said holder When said other position has been reached.

18. A machine of the class described having, in combination, a finger rest, and means whereby said rest is locked against rotary movement When operated by the Workman and is unlocked and free to move at other times.

19. A machine of the class described having, in combination, a finger rest, and means whereby said rest is locked against rotary movement when used by the operator and is automatically unlocked when released- 20. A machine of the class described having, in combination, a movably mounted finger rest and means operated by the stress incident to the operators use of it for locking said rest against rotary movement.

21. A machine of the class described having, in combination, a movably mounted finger rest, and means engageable with said rest for limiting its freedom of movement, said rest being moved into engagement with said means by the force exerted by the operator in using it.

22. A machine of the class described having, in combination, a movably mounted finger rest, constructed to move resiliently under the force exerted upon it by the operator in using it, and interlocking means so arranged as to become effective upon said resilient motion whereby said rest is locked when in use against movement in directions other than in the line of said resilient movement.

23. A machine of the class described having, in combination, an element having a slot and arranged adjacent the position of the shoe which is being burnished, a finger rest movably mounted in said element, a lug on said rest adjacent to said slot, and means for normally holding said lug disengaged from said slot.

24:. A machine of the class described having, in combination, an element arranged adjacent to the position of the shoe which is being burnished, a finger rest so mounted in said element as to permit motions of rotation and translation therein and means whereby one of said motions inhibits the other.

25. A machine of the class described having, in combination, a member arranged ad- Game: of this patent may be obtained for lar in shape to the spindle and arranged in close relation thereto throughout its extent, whereby wasteful radiation from the unit is minimized.

27. In a machine of the class described, a tool carrier, a holder carrying a plurality of tools mounted in said carrier and arranged to be moved into a plurality of positions corresponding to operative positions of the several tools, and an electric heating unit, said unit being similar in shape to an adjacent portion of the holder and the unit and portion being correspondingly placed, whereby undue waste of heat is avoided in heating the holder and tools carried thereby.

28. A machine of the class described having, in combination, shoe treating mechanism, a finger rest constructed and arranged to move freely laterally in order to avoid contact with the heel of the shoe when the rest is not in use, and means for inhibiting the lateral movement, said means being independent of the treating mechanism.

29. A machine of the class described having, in combination, shoe treating mechanism, a finger rest constructed and arranged to move freely laterally in order to avoid contact with the heel of the shoe when the rest is not in use, and means for inhibiting the lateral movement, said means being independently operable by the workman.

30. A machine of the class described having, in combination, a finger rest constructed and arranged to move freely laterally to avoid contact with the heel of the shoe when the rest is not in use, and means for inhibiting the lateral movement when the rest is in use, said means being placed in operation by stress imparted by the operator while using the rest. 7

31. In a burnishing machine, a burnishing tool, a finger rest adjustably mounted near said tool and constructed and arranged to be normally free to move laterally out of oper ative relation to said tool and to be locked in operative relation to said tool by the operator.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

FREDERICK M. FURBER.

Witnesses:

CHESTER E. ROGERS, LAURA M. Goonnmen.

five cents each, by addressing the "Commissioner of ratents, Washington, D. 0. 

